java控件之树形结构JTree

 1 import javax.swing.JFrame;
 2 import javax.swing.JTree;
 3 import javax.swing.event.TreeSelectionEvent;
 4 import javax.swing.event.TreeSelectionListener;
 5 import javax.swing.tree.DefaultMutableTreeNode;
 6 
 7 import org.eclipse.swt.widgets.Tree;
 8 
 9 /**
10  * 树状结构
11  * 
12  * @author 404
13  */
14 public class jtree extends JFrame {
15 
16     public jtree() {
17 
18         //先实例化的是父节点，实例化完父节点之后，再实例化子节点
19         DefaultMutableTreeNode Goodfriend = new DefaultMutableTreeNode("我的好友");
20         Goodfriend.add(new DefaultMutableTreeNode("好友1"));
21         Goodfriend.add(new DefaultMutableTreeNode("好友2"));
22         Goodfriend.add(new DefaultMutableTreeNode("好友3"));
23 
24         DefaultMutableTreeNode Webfriend = new DefaultMutableTreeNode("我的网友");
25         Webfriend.add(new DefaultMutableTreeNode("网友1"));
26         Webfriend.add(new DefaultMutableTreeNode("网友2"));
27         Webfriend.add(new DefaultMutableTreeNode("网友3"));
28         DefaultMutableTreeNode Doub = new DefaultMutableTreeNode("逗逼");
29         //用Doub这个对象add，那么逗逼就是最高级了。
30         Doub.add(Goodfriend);
31         Doub.add(Webfriend);
32         JTree jTree = new JTree(Doub);
33         this.add(jTree);
34         this.setTitle("JTree控件演示");
35         this.setSize(200, 300);
36         this.setVisible(true);
37         this.setLocationRelativeTo(null);//居中
38     }
39     public static void main(String[] args) {
40         new jtree();
41     }
42 }
运行结果：